The training and development $($T&D$)$ trainer completed a word$-$processing program, and the T&D trainees scored significantly lower on the test after the training than before. Which ONE of the following strategies did the T&D trainer use?

$1.$ trainee reaction

$2.$ trainee behavioural change

$3.$ trainee feedback

$4.$ trainee learning

Select one:

$1.$

trainee reaction

$2.$

trainee behavioural change

$3.$

trainee feedback

$4.$

trainee learning